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Pages: 100, Paperback, Independently published
Independently Published
Sudoku Mastermind: Hard Puzzles to Test Your Logic and Focus
150 Hard Sudoku puzzles: Advanced Puzzles to Test Your Logic and Push Limits
Ultimate Sudoku Inferno Vol.3: 1000 Brutal Puzzles from Hard to Expert Level....
150 hard sudoku puzzles: amazing puzzles for long journeys or to test your logic
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